ব্যাংক জব সল্যুশন১টি পরীক্ষায় এসেছেপ্রশ্ন ৭০If x is an integer, then which of the following statements about x2 - x - 1 is true?কIt is always oddখIt is always even.গIt is always positive.ঘIt is even when x is even and odd when x is oddউত্তর দেখুন